Seiko Cal. 5664 - 355

The Seiko 5664-355 represents an important milestone in Seiko's 1981 lineup. With its 22mm lug width and 10.8mm profile, it sits comfortably on most wrists. [seikata-wm-783f035c7a8d]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

70m

Dial Color

Navy

Jewels

34j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1981

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